Brace-head for bits and braces



(No Model.)

' F. J. COLVIN.

BRAGB HEAD POR BITS AND BRAGES.

NITE STATES a'rEr rica.

FREDERICK J. COLVIN, OF HAMDEN, CONNECTICUT.

BRACE-HEAD FOR BITS AND BRACES.

.i y `SIECIFICATION forming part of Letters Patent No. 268,460, dated December 5, 1882.

Application led September `15, 1882. (No model.)

` drawings.

This invention lrelates to brace-heads for the reception of a boring-bit, and has for its obliect to provide a simple, durable, inexpensive,

and efficient head that will give to the bit, but yet retain it securely in position.

In the drawings, Figure l is a perspective view ofthe head. Fig. 2 is acentral longitudinal sectional view. Fig. 3 isa like view on the line a: w, Fig. 2; and Fig. 4 is a perspective detail view of the interior parts separated.

Referring to lthe drawings, A designates the head, which is connected to the shank B of the brace, and is provided with a longitudinal recess, C, having` a shoulder, D, at itstop. In this recessCis placed a coiled spring,E, which is adapted to be compressed against shoulder D by the bit-socket piece F. `The latter is placed in recess C against the spring E, and is held in position by a transverse pin, Gr, passin g through the head A, and accommodated in a longitudinal recess, H, in the side of socket F, which socket fits neatly in recess C. Socket F has a central perforation, I, to receive the square end Jof the bit K, and the latter is re tained in position hy means of a cap plate or piece, L, pivoted to the bottom edge of the brace-head A and provided with a recess, M, opening from the edge. The. end of this recess, When the plate is adjusted under in locking position, comes under the enlarged end J,

and is held thus by the outward lpressure ot" normal position.

I claim as new- The combination, with the brace-head having the sliding-bit socket pressing outwardly, of a bit-securing plate pivoted at the under edge of the head and having a recess extending from the head to receive and retain the bit, as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

FREDERICK J. GOLVIN. Witnesses:

JAMES WARNER, ANDREW J. DooLITTLE. 

